Three new compounds from the roots of Saposhnikovia divaricata

From the roots of Saposhnikovia divaricata, three new compounds, divaricataesters A (1), B (2), and C (3) were isolated, along with three known compounds, cimifugin (4), (3S)-2,2-dimethyl-3,5-dihydroxy-8-hydroxymethyl-3,4-dihydro-2H,6H-benzo[1,2-b:5,4-b']dipyran-6-one (5) and 5-hydroxymethyl-furfurol (6). Their structures were established by spectral analysis and comparison with the reported data in literatures.